Tig it with stainless rod.
I do it with my shop stuff when it breaks, drill press base, has a vice sitting on it full time. Some dumbshit tried to hammer something on the foot and broke it in half so the whole press went down on him.... Unfortunately he didn't get hurt too bad but I welded it back together with stainless rod and its still standing to this day.
Or the cast iron range part I fixed for a chef when they broke it in half somehow, stainless rod.
Something about the stainless being a little more flexible than steel and castings that makes it so it won't crack. Amazing stuff, I use 308L
if there's a welder, there's a way